Tannic acid assisted copper oxide nanoglobules for sensitive electrochemical detection of bisphenol A

ABSTRACT

This study describes the development of an electrochemical sensor system for the determination of bisphenol A using tannic acid functionalized CuO nanoglobules. The utilized tannic acid acted simultaneously as both bio-compatible template and functionalizing agent for the as-synthesised CuO nanostructures. The excellent synergy of high surface area and favorable interactions between the moieties of tannic acid and bisphenol A molecules enabled sensitive electrochemical oxidation of bisphenol A within wide detection window (0.1–5.5 µM) and limit of detection estimated to be 0.01 µM. Moreover, the sensor exhibited satisfactory stability and strong anti-interference capability when evaluated against common interferents molecules such as phenol, hydroquinone, and 4-nitrophenol.

KEYWORDS:

• CuO nanostructures
• Tannic acid
• Bisphenol A
• Electrochemical sensor

Acknowledgments

The authors would like to thank the National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan for providing the facilities during this research. The authors acknowledge the contribution of IAC, University of Bristol and Dr. Keith Richard Hallam for his assistance in FEG-SEM analysis.

Funding

The authors acknowledge the Higher Education Commission, Islamabad, Pakistan for funding this research under IRSIP program.

Additional information

Funding

The authors acknowledge the Higher Education Commission, Islamabad, Pakistan for funding this research under IRSIP program.